Patents by Inventor Yasukazu KUWAYAMA
Yasukazu KUWAYAMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230417969Abstract: Provided is a light absorption anisotropic film capable of suppressing reflection occurring between the light absorption anisotropic film and a layer disposed adjacent thereto, a laminate, and an image display device. The light absorption anisotropic film includes a dichroic substance, in which a polarization degree A measured by allowing polarized light to be incident from one surface of the light absorption anisotropic film is different from a polarization degree B measured by allowing polarized light to be incident from the other surface of the light absorption anisotropic film.Type: ApplicationFiled: September 6, 2023Publication date: December 28, 2023Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Hiroshi MATSUYAMA, Naoya NISHIMURA, Hiroyuki OKUSA, Yoshinori MAEDA
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Patent number: 11822108Abstract: The present invention provides a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has a polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 or more and less than 1.78, an in-plane refractive index anisotropy ?n at a wavelength of 550 nm of the alignment film is less than 0.10.Type: GrantFiled: June 29, 2022Date of Patent: November 21, 2023Assignee: FUJIFILM CorporationInventors: Yasukazu Kuwayama, Fumitake Mitobe, Yuzo Fujiki, Jun Takeda
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Patent number: 11703708Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function in a case of being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention is a polarizing element having an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which the alignment film is a photoalignment film formed using a composition for forming a photoalignment film, including a photoactive compound having a polymerizable group and a photoreactive group, a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.Type: GrantFiled: October 15, 2020Date of Patent: July 18, 2023Assignee: FUJIFILM CorporationInventors: Yasukazu Kuwayama, Jun Takeda, Naoki Koito
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Publication number: 20230225176Abstract: The present invention provides a polarizing plate that exhibits excellent black tightness in a front direction even after an organic EL display device obtained by bonding the polarizing plate to an organic EL display panel is exposed to a high temperature environment for a long period of time; and an organic EL display device. The polarizing plate of the present invention is a polarizing plate having a polarizer formed of a composition containing a first liquid crystal compound and a dichroic substance, and an optically anisotropic layer disposed adjacent to the polarizer and formed of a composition containing a second liquid crystal compound, in which a content of the dichroic substance in the polarizer is 40% by mass or less with respect to a total mass of the polarizer.Type: ApplicationFiled: March 2, 2023Publication date: July 13, 2023Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Yuta FUKUSHIMA, Shinpei YOSHIDA
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Publication number: 20220334299Abstract: The present invention provides a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has a polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 or more and less than 1.78, an in-plane refractive index anisotropy ?n at a wavelength of 550 nm of the alignment film is less than 0.10.Type: ApplicationFiled: June 29, 2022Publication date: October 20, 2022Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
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Publication number: 20220283351Abstract: An object of the present invention is to provide a laminate including a light absorption anisotropic layer, in which a decrease in a degree of polarization is suppressed even in a case where the laminate is simultaneously stretched in a plurality of directions, and an optical device and a display device, each using the laminate. The laminate of an embodiment of the present invention is a laminate having at least a resin substrate and a light absorption anisotropic layer, in which a tan ? peak temperature of the resin substrate is 170° C. or lower, the light absorption anisotropic layer includes a liquid crystalline compound and a dichroic substance, and an alignment degree of the dichroic substance is 0.95 or more.Type: ApplicationFiled: May 24, 2022Publication date: September 8, 2022Applicant: FUJIFILM CorporationInventors: Naoya SHIBATA, Yasukazu KUWAYAMA, Naoki KOITO, Yumi KATO, Fumitake MITOBE, Naoyoshi YAMADA
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Patent number: 11415733Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.Type: GrantFiled: September 30, 2019Date of Patent: August 16, 2022Assignee: FUJIFILM CorporationInventors: Yasukazu Kuwayama, Fumitake Mitobe, Yuzo Fujiki, Jun Takeda
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Publication number: 20220204856Abstract: Provided is a polarizer with excellent durability and an image display device including the polarizer. The polarizer includes a composition for forming a polarizer which contains a polymer liquid crystal compound and a dichroic material, in which the dichroic material includes a first dichroic material and a second dichroic material, an absolute value of a difference between a log P value of the first dichroic material and a log P value of the second dichroic material is 1.0 or less, and a stabilization energy indicating an energy loss in a case where one dichroic material of the first dichroic material and the second dichroic material is incorporated into a structure singly formed of the other dichroic material that is aligned therein is 30 kcal/mol or less.Type: ApplicationFiled: March 18, 2022Publication date: June 30, 2022Applicant: FUJIFILM CorporationInventors: Yumi KATO, Yasukazu KUWAYAMA, Yoshiaki TAKADA
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Publication number: 20220206202Abstract: Provided is a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.Type: ApplicationFiled: March 17, 2022Publication date: June 30, 2022Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
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Patent number: 11173694Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.Type: GrantFiled: December 19, 2019Date of Patent: November 16, 2021Assignee: FUJIFILM CorporationInventors: Yuzo Fujiki, Yasukazu Kuwayama, Jun Takeda
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Patent number: 11148404Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.Type: GrantFiled: December 19, 2019Date of Patent: October 19, 2021Assignee: FUJIFILM CorporationInventors: Yuzo Fujiki, Yasukazu Kuwayama, Jun Takeda
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Patent number: 11054691Abstract: The present invention provides a polarizing plate including a polarizer having a high transmittance, which can be suitably applied to a circularly polarizing plate with which a significant decrease in an antireflection ability is suppressed in a case where the circularly polarizing plate is disposed on a display element; a circularly polarizing plate; and a display device. The polarizing plate includes a polarizer and an adjacent layer in contact with the polarizer, in which a transmittance in the absorption axis direction of the polarizer is 4.0% or more, and an in-plane average refractive index of the adjacent layer satisfies a relationship of Formula (X), Formula (X): Refractive index in a transmission axis direction of the polarizer<In-plane average refractive index of the adjacent layer<Refractive index in the absorption axis direction of the polarizer.Type: GrantFiled: July 28, 2020Date of Patent: July 6, 2021Assignee: FUJIFILM CorporationInventors: Fumitake Mitobe, Jun Takeda, Naoya Nishimura, Yuzo Fujiki, Yumi Katou, Yasukazu Kuwayama
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Publication number: 20210026195Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function in a case of being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention is a polarizing element having an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which the alignment film is a photoalignment film formed using a composition for forming a photoalignment film, including a photoactive compound having a polymerizable group and a photoreactive group, a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.Type: ApplicationFiled: October 15, 2020Publication date: January 28, 2021Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Jun TAKEDA, Naoki KOITO
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Publication number: 20200355960Abstract: The present invention provides a polarizing plate including a polarizer having a high transmittance, which can be suitably applied to a circularly polarizing plate with which a significant decrease in an antireflection ability is suppressed in a case where the circularly polarizing plate is disposed on a display element; a circularly polarizing plate; and a display device. The polarizing plate includes a polarizer and an adjacent layer in contact with the polarizer, in which a transmittance in the absorption axis direction of the polarizer is 4.0% or more, and an in-plane average refractive index of the adjacent layer satisfies a relationship of Formula (X), Formula (X): Refractive index in a transmission axis direction of the polarizer<In-plane average refractive index of the adjacent layer<Refractive index in the absorption axis direction of the polarizer.Type: ApplicationFiled: July 28, 2020Publication date: November 12, 2020Applicant: FUJIFILM CorporationInventors: Fumitake MITOBE, Jun TAKEDA, Naoya NISHIMURA, Yuzo FUJIKI, Yumi KATOU, Yasukazu KUWAYAMA
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Patent number: 10816848Abstract: A method for manufacturing a polarizing plate having excellent appearance properties and including a polarizer, an optical rotatory layer, and a brightness enhancement film, a polarizing plate, and a liquid crystal display device including the polarizing plate, are described. The method includes forming an optical rotatory layer, which has a film thickness of 1 to 10 ?m and rotates a polarization axis of linearly polarized light, on a temporary support to manufacture a temporary support with an optical rotatory layer; bonding the optical rotatory layer of the temporary support with an optical rotatory layer and polarizer through a curable adhesive layer, and curing the curable adhesive layer to form a first bonding layer having a storage elastic modulus of 2 to 1500 MPa; peeling off the temporary support from the laminate; and bonding the optical rotatory layer of the laminate and a brightness enhancement film through a second bonding layer.Type: GrantFiled: October 25, 2018Date of Patent: October 27, 2020Assignee: FUJIFILM CorporationInventors: Fumitake Mitobe, Jun Takeda, Yasukazu Kuwayama, Yuya Hamaguchi
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Publication number: 20200139691Abstract: An object of the present invention is to provide a laminate in which an excellent alignment property of a dichroic substance is maintained and which is excellent in both high-temperature durability and moisture-heat resistance, a manufacturing method of the laminate, and an image display device using the laminate. A laminate according to an embodiment of the present invention is a laminate having a transparent support, a light absorption anisotropic film, and a transparent resin layer in this order, in which the light absorption anisotropic film is a film containing a dichroic substance represented by a predetermined formula, and the transparent resin layer is a layer containing a polymer which has a hydrophilic group and does not have a glass transition temperature in a temperature range of 95° C. or lower.Type: ApplicationFiled: December 19, 2019Publication date: May 7, 2020Applicant: FUJIFILM CorporationInventors: Yuzo FUJIKI, Yasukazu KUWAYAMA, Jun TAKEDA
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Publication number: 20200033521Abstract: An object of the present invention is to provide a polarizing element which has an excellent antireflection function as being applied to an image display device; and a circularly polarizing plate and an image display device, each of which has the polarizing element. The polarizing element of an embodiment of the present invention has an alignment film and an anisotropic light-absorbing film formed using a dichroic substance, in which a degree S of alignment of the anisotropic light-absorbing film is 0.92 or more, and an average refractive index nave at a wavelength of 400 to 700 nm of the alignment film is 1.55 to 2.0.Type: ApplicationFiled: September 30, 2019Publication date: January 30, 2020Applicant: FUJIFILM CorporationInventors: Yasukazu KUWAYAMA, Fumitake MITOBE, Yuzo FUJIKI, Jun TAKEDA
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Patent number: 10338290Abstract: A cellulose ester film contains a compound having a structural unit denoted by —NR—(C?O)— in which R represents a hydrogen atom or a substituent, a surface having knoop hardness of greater than or equal to 210 N/mm2 is provided, and loss tangent tan ? at 25° C. is greater than or equal to 0.03.Type: GrantFiled: August 31, 2016Date of Patent: July 2, 2019Assignee: FUJIFILM CorporationInventors: Yasukazu Kuwayama, Hiroshi Inada, Aiko Yoshida, Yoshitaka Maeda, Yusuke Ino, Shuuji Kanayama, Nobutaka Fukagawa
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Publication number: 20190064587Abstract: A method for manufacturing a polarizing plate capable having excellent appearance properties and including a polarizer, an optical rotatory layer, and a brightness enhancement film, a polarizing plate, and a liquid crystal display device including the polarizing plate, are described. The method includes forming an optical rotatory layer, which has a film thickness of 10 ?m or less and rotates a polarization axis of linearly polarized light, on a temporary support to manufacture a temporary support with an optical rotatory layer; bonding the optical rotatory layer of the temporary support with an optical rotatory layer and polarizer through a curable adhesive layer, and curing the curable adhesive layer to form a first bonding layer having a storage elastic modulus of 2 to 1500 MPa; peeling off the temporary support from the laminate; and bonding the optical rotatory layer of the laminate and a brightness enhancement film through a second bonding layer.Type: ApplicationFiled: October 25, 2018Publication date: February 28, 2019Applicant: FUJIFILM CorporationInventors: Fumitake MITOBE, Jun TAKEDA, Yasukazu KUWAYAMA, Yuya HAMAGUCHI
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Patent number: 10160846Abstract: The inventions are an optical film containing cellulose acylate and a compound having a structure denoted by General Formula (A) described below, and a polarizing plate and a liquid crystal display device employing the optical film. L represents n-valent connecting group, n represents an integer of greater than or equal to 2, and A represents a heterocyclic group denoted by General Formula (I). R1, R3, and R5 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, or a heteroaryl group. Here, any one of R1, R3, and R5 is bonded to L.Type: GrantFiled: January 8, 2016Date of Patent: December 25, 2018Assignee: FUJIFILM CorporationInventors: Masaki Noro, Yutaka Nozoe, Hiroshi Inada, Naoya Shimoju, Aiko Yoshida, Yu Naito, Yasukazu Kuwayama